Communication device and communication system

Abstract

In order to reduce IO processing delay when information transmitted and received between a server and a storage device via a fiber channel line is lost, after receiving, from the transmission source via the fiber channel line, identification information assigned to an information group transmitted by a transmission source, when it is determined, on the basis of the identification information, that at least part of the information group has not been received, the communication device transmits prescribed transmission information to the transmission source via the fiber channel line.

What is claimed is: 
     
         1 . A communication device
 issuing predetermined transmission information to a source through a Fibre Channel line when determining that at least part of an information group transmitted by the source is not received, based on identification information assigned to the information group, after receiving the identification information from the source through the Fibre Channel line.   
     
     
         2 . The communication device according to  claim 1 , wherein
 the transmission information is a first response to the identification information.   
     
     
         3 . The communication device according to  claim 1 , wherein
 the transmission information includes information indicating the non-reception.   
     
     
         4 . The communication device according to  claim 1 , wherein,
 when reception is determined for the every information group, the issuance of second transmission information is performed.   
     
     
         5 . The communication device according to  claim 4 , wherein
 the second transmission information is a second response to the identification information.   
     
     
         6 . The communication device according to  claim 4 , wherein
 the second transmission information includes information indicating the reception.   
     
     
         7 . The communication device according to  claim 1 , wherein
 the issuance may not be executed.   
     
     
         8 . The communication device according to  claim 1 , wherein
 the information group is a data frame group including one or more data frames.   
     
     
         9 . The communication device according to  claim 1 , wherein
 the information group is any one of a Write command, a Read command, XferReady, and Response that are based on a Fibre Channel standard.   
     
     
         10 . The communication device according to  claim 1 , wherein
 the information group includes a data group including input-output processing target data.   
     
     
         11 . The communication device according to  claim 1 , wherein
 the information group includes at least any one of a Write command, a Read command, XferReady, and Response that are based on a Fibre Channel standard.   
     
     
         12 . The communication device according to  claim 1 , wherein
 the communication device is included in a server.   
     
     
         13 . The communication device according to  claim 1 , wherein
 the communication device is included in a storage device.   
     
     
         14 . A communication system comprising:
 the communication device according to  claim 1 ; and   the source.   
     
     
         15 . The communication system according to  claim 14 , wherein
 the communication device and the source mutually perform input-output processing related to predetermined data through the Fibre Channel line.   
     
     
         16 . The communication system according to  claim 15 , wherein
 a second mode being a mode related to the input-output processing in which the issuance is not performed is included.   
     
     
         17 . The communication system according to  claim 16 , wherein
 the source makes a determination about whether to be in the second mode, based on the data.   
     
     
         18 . The communication system according to  claim 16 , wherein,
 with respect to the input-output processing related to a first mode being the mode in which the issuance is performed, the source sends second identification information indicating the input-output processing and specification information indicating the first mode to the communication device.   
     
     
         19 - 23 . (canceled) 
     
     
         24 . A communication method comprising
 issuing predetermined transmission information to a source through a Fibre Channel line when determining that at least part of an information group transmitted by the source is not received, based on identification information assigned to the information group, after receiving the identification information from the source through the Fibre Channel line.   
     
     
         25 . A non transitory computer readable recording medium having a communication program stored thereon, the communication program causing a computer to execute
 processing of issuing predetermined transmission information to a source through a Fibre Channel line when determining that at least part of an information group transmitted by the source is not received, based on identification information assigned to the information group, after receiving the identification information from the source through the Fibre Channel line.